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In 1860, there were 4.5 million Americans of Afro-American descent, 4 million of which were slaves, worth $3 billion. [118] They were mainly owned by southern planters of cotton and sugarcane. An estimated 60% of the value of farms in Alabama, Georgia, Louisiana, Mississippi and South Carolina was in slaves, with less than a third in land and ...
47 ka ~ 9.8 Ga [4] 3600 ~ 0.4: 10 4 K ~ 4 K: During this time, the energy density of matter dominates both radiation density and dark energy, resulting in a decelerated expansion of the universe. Dark energy dominated era > 9.8 Ga [16] < 0.4 < 4 K Matter density falls below dark energy density (vacuum energy), and expansion of space begins to ...